/* ===== 全局样式重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #B8860B;
    --primary-light: #DAA520;
    --primary-dark: #8B6914;
    --secondary: #2C3E50;
    --accent: #E74C3C;
    --bg-light: #FAFAF8;
    --bg-warm: #FDF8F0;
    --bg-warm-alt: #F8F0E0;
    --bg-gold-soft: #FFF8E7;
    --bg-dark: #1A1A2E;
    --text: #2D3436;
    --text-light: #636E72;
    --text-lighter: #B2BEC3;
    --white: #FFFFFF;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--bg-light);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.container-narrow {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(184, 134, 11, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(184, 134, 11, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* ===== 顶部栏 ===== */
.top-bar {
    background: var(--secondary);
    color: rgba(255,255,255,0.75);
    padding: 6px 0;
    font-size: 13px;
    letter-spacing: 0.3px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar .top-phone {
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar .top-tagline {
    font-size: 12px;
    opacity: 0.6;
}

/* ===== 导航栏 ===== */
.navbar {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
    height: 72px;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 44px;
    width: auto;
    border-radius: 8px;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 2px;
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    padding: 8px 20px;
    border-radius: 50px;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(184, 134, 11, 0.08);
    color: var(--primary);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.hamburger:hover {
    background: rgba(0,0,0,0.05);
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 轮播 ===== */
.hero {
    position: relative;
    width: 100%;
    height: 520px;
    overflow: hidden;
    background: var(--secondary);
}

.hero-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: contain !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    background-color: #1a1a2e !important;
}

.slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26,26,46,0.85), rgba(26,26,46,0.4));
    z-index: 1;
}

.slide.active {
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
    text-align: center;
    padding: 0 24px;
    animation: heroFadeIn 0.8s ease;
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: 1px;
}

.hero-content p {
    font-size: 18px;
    color: rgba(255,255,255,0.75);
    margin-bottom: 32px;
    line-height: 1.6;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.slider-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dots span.active {
    background: var(--primary-light);
    width: 28px;
    border-radius: 5px;
}

/* ===== 通用标题 ===== */
.section-title {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.section-title::before {
    content: '◆';
    display: block;
    font-size: 12px;
    color: var(--primary-light);
    margin-bottom: 12px;
    opacity: 0.4;
    letter-spacing: 8px;
}

.section-title h2 {
    font-size: 34px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    margin: 16px auto 0;
    border-radius: 2px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-light);
    margin-top: 12px;
}

/* ===== 服务 ===== */
.services {
    padding: 100px 0;
    background: linear-gradient(170deg, var(--bg-warm) 0%, var(--bg-light) 50%, var(--bg-warm-alt) 100%);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-light), var(--primary), var(--primary-light), transparent);
}

.services::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(184, 134, 11, 0.03) 0%, transparent 50%),
                      radial-gradient(circle at 80% 50%, rgba(218, 165, 32, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    padding: 40px 28px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(184, 134, 11, 0.08);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(184, 134, 11, 0.06);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(184,134,11,0.1), rgba(218,165,32,0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--secondary);
}

.service-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== 产品 ===== */
.products {
    padding: 100px 0;
    background: linear-gradient(190deg, var(--white) 0%, var(--bg-gold-soft) 100%);
    position: relative;
}

.products::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 80% 20%, rgba(184, 134, 11, 0.04) 0%, transparent 40%);
    pointer-events: none;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(184, 134, 11, 0.08);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid rgba(184, 134, 11, 0.06);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.product-image {
    height: 220px;
    background: linear-gradient(135deg, #e8e0d0, #f0e8d8);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-image-icon {
    font-size: 48px;
    opacity: 0.5;
}

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--secondary);
}

.product-info p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
}

.product-price {
    color: var(--accent);
    font-size: 20px;
    font-weight: 700;
}

.product-category {
    font-size: 12px;
    color: var(--text-lighter);
    background: var(--bg-light);
    padding: 4px 12px;
    border-radius: 20px;
}

/* ===== 关于 ===== */
.about {
    padding: 100px 0;
    background: linear-gradient(170deg, var(--bg-warm) 0%, var(--white) 50%, var(--bg-warm-alt) 100%);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-light), var(--primary), var(--primary-light), transparent);
}

.about::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 30% 70%, rgba(218, 165, 32, 0.03) 0%, transparent 45%);
    pointer-events: none;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 34px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.about-text h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    margin-top: 16px;
    border-radius: 2px;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.8;
    font-size: 15px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid #f0f0f0;
}

.stat-item {
    text-align: left;
}

.stat-num {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

.about-image-wrapper {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    background: var(--bg-light);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image-placeholder {
    color: var(--text-lighter);
    font-size: 64px;
    text-align: center;
}

/* ===== 案例 - 瀑布流 ===== */
.cases {
    padding: 100px 0;
    background: linear-gradient(190deg, var(--bg-gold-soft) 0%, var(--bg-light) 100%);
    position: relative;
}

.cases-masonry {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(184, 134, 11, 0.06);
    transition: var(--transition);
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
    border: 1px solid rgba(184, 134, 11, 0.06);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.case-img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: linear-gradient(135deg, #e8e0d0, #f0e8d8);
}

.case-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-img-wrap img {
    transform: scale(1.06);
}

.case-no-img {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--text-lighter);
}

.case-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.case-card-body {
    padding: 20px;
}

.case-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.case-card-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
}

.case-card-footer {
    display: flex;
    gap: 16px;
    padding-top: 12px;
    border-top: 1px solid #f0f0f0;
    font-size: 12px;
    color: var(--text-lighter);
}

/* ===== 视频 ===== */
.videos {
    padding: 100px 0;
    background: linear-gradient(170deg, var(--bg-warm) 0%, var(--white) 100%);
    position: relative;
}

.videos::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-light), var(--primary), var(--primary-light), transparent);
}

.video-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.video-item {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.video-item:hover {
    box-shadow: var(--shadow-hover);
}

.video-item video {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    background: #000;
    display: block;
}

.video-info {
    padding: 20px;
}

.video-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--secondary);
}

.video-info p {
    font-size: 13px;
    color: var(--text-light);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    background: var(--bg-light);
    border-radius: var(--radius);
    color: var(--text-lighter);
    font-size: 16px;
}

/* ===== 联系我们 ===== */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 50%, #0f0f23 100%);
    color: var(--white);
    position: relative;
}

.contact::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 70% 30%, rgba(218, 165, 32, 0.06) 0%, transparent 45%);
    pointer-events: none;
}

.contact .section-title h2,
.contact .section-title p {
    color: var(--white);
}

.contact .section-title h2::after {
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: rgba(255,255,255,0.05);
    padding: 20px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255,255,255,0.1);
}

.contact-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(184, 134, 11, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    margin-bottom: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-text p {
    font-size: 15px;
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

.contact-form {
    background: rgba(255,255,255,0.06);
    padding: 36px;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.08);
}

.contact-form h3 {
    font-size: 22px;
    margin-bottom: 24px;
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 16px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    background: rgba(255,255,255,0.12);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: rgba(255,255,255,0.35);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form button {
    width: 100%;
    justify-content: center;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #0f0f23 100%);
    color: rgba(255,255,255,0.6);
    padding: 60px 0 20px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-dark), var(--primary-light), var(--primary-dark), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 32px;
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.footer-brand img {
    height: 44px;
    border-radius: 8px;
}

.footer-brand-text h4 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 8px;
}

.footer-brand-text p {
    font-size: 13px;
    line-height: 1.8;
}

.footer h4 {
    color: var(--white);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

.footer ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-contact-list p {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 13px;
    color: rgba(255,255,255,0.3);
}

/* ===== Toast 提示 ===== */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 380px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    background: linear-gradient(135deg, #10B981, #059669);
}

.toast.error {
    background: linear-gradient(135deg, #EF4444, #DC2626);
}

.toast.info {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

/* ===== Loading Spinner ===== */
.loading-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
}

.spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 3px solid rgba(184, 134, 11, 0.15);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-masonry { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 1fr; gap: 40px; }
    .about-image-wrapper { height: 300px; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr 1fr; }
    .hero-content h1 { font-size: 36px; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: 8px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        transform: translateY(-120%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .nav-links.active { transform: translateY(0); }

    .nav-links a {
        padding: 14px 20px;
        border-radius: var(--radius-sm);
    }

    .hero { height: 400px; }
    .hero-content h1 { font-size: 28px; }
    .hero-content p { font-size: 15px; }

    .section-title h2 { font-size: 26px; }

    .service-grid,
    .product-grid,
    .cases-masonry {
        grid-template-columns: 1fr;
    }

    .about-stats { flex-wrap: wrap; gap: 24px; }
    .contact-info { grid-template-columns: 1fr; }
    .contact-form { padding: 24px; }
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .footer-brand { flex-direction: column; align-items: center; }

    .service-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .service-grid { grid-template-columns: 1fr; }
    .hero { height: 340px; }
    .hero-content h1 { font-size: 24px; }
    .container { padding: 0 20px; }
}

/* ===== 管理后台 ===== */
.admin-body {
    background: #F0F2F5;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.admin-header {
    background: var(--secondary);
    color: var(--white);
    padding: 0 32px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-header h1 {
    font-size: 17px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.admin-header a {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    transition: var(--transition);
    padding: 6px 14px;
    border-radius: 6px;
}

.admin-header a:hover {
    color: var(--white);
    background: rgba(255,255,255,0.1);
}

.admin-container {
    display: flex;
    min-height: calc(100vh - 60px);
}

.admin-sidebar {
    width: 220px;
    background: var(--white);
    padding: 16px 0;
    box-shadow: 1px 0 4px rgba(0,0,0,0.04);
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
    overflow-y: auto;
}

.admin-sidebar ul li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: var(--transition);
}

.admin-sidebar ul li a:hover {
    background: var(--bg-light);
    color: var(--primary);
}

.admin-sidebar ul li a.active {
    background: rgba(184, 134, 11, 0.06);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

.admin-content {
    flex: 1;
    padding: 32px;
    max-width: calc(100vw - 220px);
}

.admin-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.admin-card h2 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
    color: var(--secondary);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

.admin-table th {
    background: var(--bg-light);
    font-weight: 600;
    color: var(--text-light);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tr:hover td {
    background: #FAFAFA;
}

.admin-btn {
    padding: 6px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
}

.admin-btn-edit {
    background: rgba(184, 134, 11, 0.1);
    color: var(--primary);
}

.admin-btn-edit:hover {
    background: var(--primary);
    color: white;
}

.admin-btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: #EF4444;
}

.admin-btn-delete:hover {
    background: #EF4444;
    color: white;
}

.admin-form {
    max-width: 560px;
}

.admin-form-group {
    margin-bottom: 20px;
}

.admin-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
    font-size: 14px;
}

.admin-form-group input,
.admin-form-group textarea,
.admin-form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.admin-form-group input:focus,
.admin-form-group textarea:focus,
.admin-form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.1);
}

.admin-form-group small {
    display: block;
    color: var(--text-lighter);
    font-size: 12px;
    margin-top: 4px;
}

/* Admin stats cards */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card {
    padding: 24px;
    border-radius: var(--radius-sm);
    text-align: center;
    color: white;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.stat-card .stat-number {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 14px;
    opacity: 0.85;
}

/* Admin quick actions */
.admin-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.admin-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.admin-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Product thumb in admin */
.product-thumb {
    width: 64px;
    height: 48px;
    object-fit: cover;
    border-radius: 4px;
    background: var(--bg-light);
}

.no-image {
    width: 64px;
    height: 48px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-size: 11px;
    color: var(--text-lighter);
}

/* Login page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--secondary), #1a1a2e);
}

.login-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px 40px;
    width: 400px;
    max-width: 90vw;
    box-shadow: 0 24px 64px rgba(0,0,0,0.2);
}

.login-box h1 {
    font-size: 22px;
    text-align: center;
    color: var(--secondary);
    margin-bottom: 8px;
}

.login-box p {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-box .form-group {
    margin-bottom: 20px;
}

.login-box .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.login-box .form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: var(--transition);
}

.login-box .form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.1);
}

.login-box .login-btn {
    width: 100%;
    padding: 14px;
    justify-content: center;
    font-size: 16px;
}

.login-error {
    background: rgba(239, 68, 68, 0.08);
    color: #EF4444;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.login-error.show {
    display: block;
}

/* Slider preview in admin */
.slider-preview {
    width: 200px;
    height: 100px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--bg-light);
}

.slider-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px;
    border-bottom: 1px solid #f0f0f0;
    transition: var(--transition);
}

.slider-item:hover {
    background: var(--bg-light);
}

.slider-item:last-child {
    border-bottom: none;
}

/* Admin modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal-overlay.show {
    display: flex;
}

.modal-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 480px;
    width: 90vw;
    box-shadow: 0 24px 64px rgba(0,0,0,0.2);
}

.modal-box h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.modal-box p {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive admin */
@media (max-width: 768px) {
    .admin-sidebar {
        display: none;
    }
    .admin-content {
        max-width: 100%;
        padding: 16px;
    }
    .admin-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .admin-table {
        font-size: 13px;
    }
    .admin-table th, .admin-table td {
        padding: 8px 10px;
    }
    .slider-preview {
        width: 100px;
        height: 60px;
    }
}